The USDA’s winter hardiness zone map has long been the standard used by home gardeners, plant breeders and researchers to determine which plants are most likely to thrive in their location, based on ... NOLA.com: Hardiness and heat zone maps help in choosing plants that thrive year-round Hardiness and heat zone maps help in choosing plants that thrive year-round Chicago Tribune: Gardeners see warmer hardiness zones for plants, but not by much Yahoo: The USDA Plant Hardiness Zone Map Just Changed for the First Time in Over 10 Years The USDA Plant Hardiness Zone Map Just Changed for the First Time in Over 10 Years The Weather Channel launches a new Home & Garden forecast tool that combines local weather data with USDA hardiness zones to provide personalized planting calendars and daily gardening recommendations ... NJ.com: New USDA Plant Hardiness Zone Map reflects warmer growing climates with increased accuracy New USDA Plant Hardiness Zone Map reflects warmer growing climates with increased accuracy inforum: Plant hardiness zone map an important, but not tell-all tool for gardeners Plant hardiness zone map an important, but not tell-all tool for gardeners